The thiazolidinediones were introduced as oral hypoglycemic drugs in Sweden during the fall of 2000. A case is reported in which a woman with insulin-dependent type-2 diabetes and both macro- and microangiopathy and pronounced insulin resistance was treated with rosiglitazone (Avandia). Within three months insulin doses could be reduced by 36% (from 176 to 112 units insulin daily) and concomitantly Ery-HbA1c was reduced from 8.4 to 5.3%. In spite of this dramatic effect on glucose homeostasis administration of the drug had to be discontinued due to critical congestive heart failure.